bin/ed/ed.h

/* ed.h: type and constant definitions for the ed editor. */
/*
 * Copyright (c) 1993 Andrew Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)$Id: ed.h,v 1.4 1993/12/15 15:22:02 alm Exp alm $
 */

#if defined(BSD) && BSD >= 199103 || defined(__386BSD__)
# include <sys/param.h>         /* for MAXPATHLEN */
#endif
#include <errno.h>
#ifdef sun
# include <limits.h>
#endif
#include <regex.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define ERR             (-2)
#define EMOD            (-3)
#define FATAL           (-4)

#ifndef MAXPATHLEN
# define MAXPATHLEN 255         /* _POSIX_PATH_MAX */
#endif

#define MINBUFSZ 512            /* minimum buffer size - must be > 0 */
#define SE_MAX 30               /* max subexpressions in a regular expression */
#ifdef INT_MAX
# define LINECHARS INT_MAX      /* max chars per line */
#else
# define LINECHARS MAXINT       /* max chars per line */
#endif

/* gflags */
#define GLB 001         /* global command */
#define GPR 002         /* print after command */
#define GLS 004         /* list after command */
#define GNP 010         /* enumerate after command */
#define GSG 020         /* global substitute */

typedef regex_t pattern_t;

/* Line node */
typedef struct  line {
        struct line     *q_forw;
        struct line     *q_back;
        off_t           seek;           /* address of line in scratch buffer */
        int             len;            /* length of line */
} line_t;


typedef struct undo {

/* type of undo nodes */
#define UADD    0
#define UDEL    1
#define UMOV    2
#define VMOV    3

        int type;                       /* command type */
        line_t  *h;                     /* head of list */
        line_t  *t;                     /* tail of list */
} undo_t;

#ifndef max
# define max(a,b) ((a) > (b) ? (a) : (b))
#endif
#ifndef min
# define min(a,b) ((a) < (b) ? (a) : (b))
#endif

#define INC_MOD(l, k)   ((l) + 1 > (k) ? 0 : (l) + 1)
#define DEC_MOD(l, k)   ((l) - 1 < 0 ? (k) : (l) - 1)

/* SPL1: disable some interrupts (requires reliable signals) */
#define SPL1() mutex++

/* SPL0: enable all interrupts; check sigflags (requires reliable signals) */
#define SPL0() \
if (--mutex == 0) { \
        if (sigflags & (1 << (SIGHUP - 1))) handle_hup(SIGHUP); \
        if (sigflags & (1 << (SIGINT - 1))) handle_int(SIGINT); \
}

/* STRTOL: convert a string to long */
#define STRTOL(i, p) { \
        if (((i = strtol(p, &p, 10)) == LONG_MIN || i == LONG_MAX) && \
            errno == ERANGE) { \
                sprintf(errmsg, "number out of range"); \
                i = 0; \
                return ERR; \
        } \
}

#if defined(sun) || defined(NO_REALLOC_NULL)
/* REALLOC: assure at least a minimum size for buffer b */
#define REALLOC(b,n,i,err) \
if ((i) > (n)) { \
        int ti = (n); \
        char *ts; \
        SPL1(); \
        if ((b) != NULL) { \
                if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \
                        fprintf(stderr, "%s\n", strerror(errno)); \
                        sprintf(errmsg, "out of memory"); \
                        SPL0(); \
                        return err; \
                } \
        } else { \
                if ((ts = (char *) malloc(ti += max((i), MINBUFSZ))) == NULL) { \
                        fprintf(stderr, "%s\n", strerror(errno)); \
                        sprintf(errmsg, "out of memory"); \
                        SPL0(); \
                        return err; \
                } \
        } \
        (n) = ti; \
        (b) = ts; \
        SPL0(); \
}
#else /* NO_REALLOC_NULL */
/* REALLOC: assure at least a minimum size for buffer b */
#define REALLOC(b,n,i,err) \
if ((i) > (n)) { \
        int ti = (n); \
        char *ts; \
        SPL1(); \
        if ((ts = (char *) realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \
                fprintf(stderr, "%s\n", strerror(errno)); \
                sprintf(errmsg, "out of memory"); \
                SPL0(); \
                return err; \
        } \
        (n) = ti; \
        (b) = ts; \
        SPL0(); \
}
#endif /* NO_REALLOC_NULL */

/* REQUE: link pred before succ */
#define REQUE(pred, succ) (pred)->q_forw = (succ), (succ)->q_back = (pred)

#ifdef NEED_INSQUE
/* insque: insert elem in circular queue after pred */
#define insque(elem, pred) \
{ \
        REQUE((elem), (pred)->q_forw); \
        REQUE((pred), elem); \
}

/* remque: remove_lines elem from circular queue */
#define remque(elem) REQUE((elem)->q_back, (elem)->q_forw);
#endif /* NEED_INSQUE */

/* NUL_TO_NEWLINE: overwrite ASCII NULs with newlines */
#define NUL_TO_NEWLINE(s, l) translit_text(s, l, '\0', '\n')

/* NEWLINE_TO_NUL: overwrite newlines with ASCII NULs */
#define NEWLINE_TO_NUL(s, l) translit_text(s, l, '\n', '\0')

#ifndef strerror
# define strerror(n) sys_errlist[n]
#endif

#ifndef __P
# ifndef __STDC__
#  define __P(proto) ()
# else
#  define __P(proto) proto
# endif
#endif

/* Local Function Declarations */
void add_line_node __P((line_t *));
int append_lines __P((long));
int apply_subst_template __P((char *, regmatch_t *, int, int));
int build_active_list __P((int));
int cbc_decode __P((char *, FILE *));
int cbc_encode __P((char *, int, FILE *));
int check_addr_range __P((long, long));
void clear_active_list __P((void));
void clear_undo_stack __P((void));
int close_sbuf __P((void));
int copy_lines __P((long));
int delete_lines __P((long, long));
void des_error __P((char *));
int display_lines __P((long, long, int));
line_t *dup_line_node __P((line_t *));
int exec_command __P((void));
long exec_global __P((int, int));
void expand_des_key __P((char *, char *));
int extract_addr_range __P((void));
char *extract_pattern __P((int));
int extract_subst_tail __P((int *, int *));
char *extract_subst_template __P((void));
int filter_lines __P((long, long, char *));
int flush_des_file __P((FILE *));
line_t *get_addressed_line_node __P((long));
pattern_t *get_compiled_pattern __P((void));
int get_des_char __P((FILE *));
char *get_extended_line __P((int *, int));
char *get_filename __P((void));
int get_keyword __P((void));
long get_line_node_addr __P((line_t *));
long get_matching_node_addr __P((pattern_t *, int));
long get_marked_node_addr __P((int));
char *get_sbuf_line __P((line_t *));
int get_shell_command __P((void));
int get_stream_line __P((FILE *));
int get_tty_line __P((void));
void handle_hup __P((int));
void handle_int __P((int));
void handle_winch __P((int));
int has_trailing_escape __P((char *, char *));
int hex_to_binary __P((int, int));
void init_buffers __P((void));
void init_des_cipher __P((void));
int is_legal_filename __P((char *));
int join_lines __P((long, long));
int mark_line_node __P((line_t *, int));
int move_lines __P((long));
line_t *next_active_node __P(());
long next_addr __P((void));
int open_sbuf __P((void));
char *parse_char_class __P((char *));
int pop_undo_stack __P((void));
undo_t *push_undo_stack __P((int, long, long));
int put_des_char __P((int, FILE *));
char *put_sbuf_line __P((char *));
int put_stream_line __P((FILE *, char *, int));
int put_tty_line __P((char *, int, long, int));
void quit __P((int));
long read_file __P((char *, long));
long read_stream __P((FILE *, long));
int search_and_replace __P((pattern_t *, int, int));
int set_active_node __P((line_t *));
void set_des_key __P((char *));
void signal_hup __P((int));
void signal_int __P((int));
char *strip_escapes __P((char *));
int substitute_matching_text __P((pattern_t *, line_t *, int, int));
char *translit_text __P((char *, int, int, int));
void unmark_line_node __P((line_t *));
void unset_active_nodes __P((line_t *, line_t *));
long write_file __P((char *, char *, long, long));
long write_stream __P((FILE *, long, long));

/* global buffers */
extern char stdinbuf[];
extern char *ibuf;
extern char *ibufp;
extern int ibufsz;

/* global flags */
extern int isbinary;
extern int isglobal;
extern int modified;
extern int mutex;
extern int sigflags;

/* global vars */
extern long addr_last;
extern long current_addr;
extern char errmsg[];
extern long first_addr;
extern int lineno;
extern long second_addr;
#ifdef sun
extern char *sys_errlist[];
#endif